Stas,
Wow this business of PPI etc. is really confusing and full of myths as well as being misunderstood by many professionals. After some intensive studying I have a better understanding of your remarks. But with that said I am still confused as to why Helicon renders a photo from NEF files at 72 PPI while rendering the same photos that were converted to TIFF or JPEG files at 240 PPI.
Doug